What is a fault tolerance system and give an example?

What is a fault tolerance system and give an example?

A twin-engine airplane is a fault tolerant system – if one engine fails, the other one kicks in, allowing the plane to continue flying. Conversely, a car with a spare tire is highly available. A flat tire will cause the car to stop, but downtime is minimal because the tire can be easily replaced.

What is meant by fault tolerant system?

Fault tolerance is a process that enables an operating system to respond to a failure in hardware or software. This fault-tolerance definition refers to the system’s ability to continue operating despite failures or malfunctions.

Which system is suitable for fault tolerance?

Fault tolerance can be provided with software embedded in hardware, or by some combination of the two. In a software implementation, the operating system (OS) provides an interface that allows a programmer to checkpoint critical data at predetermined points within a transaction.

What is the fault tolerance principle?

Fault tolerance is the property that enables a system to continue operating properly in the event of the failure of one or more faults within some of its components.

What is VMware fault-tolerance?

VMware vSphere Fault Tolerance (FT) provides continuous availability for applications (with up to four virtual CPUs) by creating a live shadow instance of a virtual machine that mirrors the primary virtual machine.

What is fault containment in a fault tolerant system?

Fault containment is an important constituent of fault tolerance. Means for fault containment allow a system to limit the impact of manifested faults to some predefined system boundaries. These patterns are elicited from the areas of self-stabilization, specification closure and fault tolerant OS kernels.

Why is fault tolerance important?

Fault tolerance on a system is a feature that enables a system to continue with its operations even when there is a failure on one part of the system. The system can continue its operations at a reduced level rather than be failing completely. This helps in fault isolation through failure detection mechanisms.

What is VMware fault tolerance?

How do you create a fault tolerant system?

To make it a fault tolerant, we need to identify potential failures, which a system might encounter, and design counteractions. Each failure’s frequency and impact on the system need to be estimated to decide which one a system should tolerate.

How does VMware fault tolerance work?

Fault Tolerance avoids “split-brain” situations, which can lead to two active copies of a virtual machine after recovery from a failure. Atomic file locking on shared storage is used to coordinate failover so that only one side continues running as the Primary VM and a new Secondary VM is respawned automatically.

How do you set up fault tolerance?

Procedure

1. In the vSphere Client, browse to the virtual machine for which you want to turn on Fault Tolerance.
2. Right-click the virtual machine and select Fault Tolerance > Turn On Fault Tolerance.
3. Click Yes.
4. Select a datastore on which to place the Secondary VM configuration files.

What is fault containment?